2.2 allowed me to set DMA on an SIS 5513 using an IBM Deskstar 40 gig IDE. 2.4 goes "Operation not permitted" when I try it. Why? I hit it with ide0=ata66 in lilo, and it sped up from 3 megs/sec to 5 megs/second, but I used to get 12. hdparm /dev/hda still says I'm not using DMA. I realise I'm doing dangerous stuff here to get the performance back. I'm just curious why it's not doing it for me. (Is there a known problem I should be worried about?) Let's see, ide0=dma,ata66... right? Should I be really really worried about my data integrity if I do this? It never had a problem under 2.2... Rob __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/